t / t5100 / info0014--scissorson commit help_unknown_ref(): check for refname ambiguity (2ed2e19)
   1Author: Junio C Hamano
   2Email: gitster@pobox.com
   3Subject: Teach mailinfo to ignore everything before -- >8 -- mark
   4Date: Thu, 20 Aug 2009 17:18:22 -0700
   5